Development of a temperature-dependent chemical simulation code based on PHITS for water radiolysis from 0 to 350 °C
Rattachement africain : jp. Niveau de preuve : code pays fourni par la source.
Le résumé fourni par la source
Water radiolysis plays an important role in radiation effects on materials, including DNA damage in the human body and corrosion processes in nuclear reactors. To quantitatively evaluate radiolytic molecular yields (G-values), several Monte Carlo simulation codes for analyzing chemical species kinetics have been developed worldwide. However, conventional chemical simulation codes are generally limited to room temperature (roughly equivalent to the human body), which differs from the temperatures encountered in nuclear reactor environments. Therefore, incorporating temperature dependence into chemical simulations is essential for evaluating G-values under high-temperature conditions. In this study, we developed a chemical simulation code (PHITS-Chem) based on the general-purpose Monte Carlo code, Particle and Heavy Ion Transport code System (PHITS), applicable to the 0-350 °C temperature range. The present PHITS-Chem code explicitly accounts for the temperature dependences of diffusion coefficients and chemical reaction rate constants. The present code was benchmarked against reported experimental and theoretical G-values for low-LET (~ 0.2 keV/µm), moderate-LET (~ 11.9 keV/µm), and high-LET (~ 63.4 keV/µm) radiations, showing good agreement with the literature. The validated temperature range spans from 0 to 350 °C, covering conditions relevant to the human body, cryosphere, and light water reactors. To further improve the predictive capability and extend the applicability of the model, additional verification and updates will be required in future studies. The renewed PHITS-Chem thus enables high-precision estimation of radiolytic chemical species kinetics across a broad temperature range, which would be valuable for assessing in-core material degradation and mitigating severe accidents in nuclear reactors.
Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.
Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- Development of a temperature-dependent chemical simulation code based on PHITS for water radiolysis from 0 to 350 °C
- Date Crossref
- 11/05/2026
- Éditeur
- Springer Science and Business Media LLC
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
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Japan Atomic Energy Agency Nuclear Science and Engineering Center pays non établi dans la noticeOrganisme public
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Hokkaido University of Science pays non établi dans la noticeUniversité ou école supérieure
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National Institutes for Quantum Science and Technology pays non établi dans la noticeStructure de recherche
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Sapporo University pays non établi dans la noticeUniversité ou école supérieure
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Hokkaido University pays non établi dans la noticeUniversité ou école supérieure
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Faculty of Health Sciences pays non établi dans la noticeUniversité ou école supérieure
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National Institutes for Quantum and Radiological Science and Technology pays non établi dans la noticeStructure de recherche
Nuclear Science and Engineering Center — Japan Atomic Energy Agency, Hokkaido University of Science et National Institutes for Quantum Science and Technology, avec 4 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.